I have new hardware alerts where scans are finding ghost devices that don't exist on the network. 20 to 30 new devices found. Each with different IP's and none of them trule exist in reality. What might cause something like this to happen? It's frustrating and also difficult to determine when something new truly has been introduced to the network. Any help would be greatly appreicated.

TimJ42 - the change you suggesed setting: ping_external: to true instead of false worked for a few days. However this morning I have a bunch of phantom devices again. Upon checking the ping_external: setting I see the value has switched back to "false" instead of true. What can I do to have this setting stick permanently?

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